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Writer can be covariant? #4630

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Writer can be covariant? #4630

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2 changes: 1 addition & 1 deletion core/src/main/scala/cats/data/WriterT.scala
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Expand Up @@ -25,7 +25,7 @@ package data
import cats.Foldable
import cats.kernel.CommutativeMonoid

final case class WriterT[F[_], L, V](run: F[(L, V)]) {
final case class WriterT[F[_], +L, +V](run: F[(L, V)]) {

/**
* Example:
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